Record Display for the EPA National Library Catalog

RECORD NUMBER: 3 OF 10

OLS Field Name OLS Field Data
Main Title AERSURFACE user's guide.
CORP Author Environmental Protection Agency, Research Triangle Park, NC. Office of Air Quality Planning and Standards.
Publisher U. S. Environmental Protection Agency, Office of Air Quality Planning Standards, Air Quality Assessment Division, Air Quality Modeling Group,
Year Published 2008
Report Number EPA/454/B-08/001; PB2008-111717
Stock Number PB2008-111717
OCLC Number 244104596
Subjects Geospatial data--United States ; Software documentation
Additional Subjects Air quality dispersion models ; Diffusion modeling ; Error handling ; File descriptions ; Atmospheric pollution ; Meteorological data ; Users guide ; Categories ; User instructions ; Tables (Data) ; Land cover ; AERSURFACE tool ; AERMET meteorological processor ; AERSURFACE calculation methods ; Interactive user prompts ; Boundary layer flow
Internet Access
Description Access URL
http://www.epa.gov/scram001/7thconf/aermod/aersurface_userguide.pdf
http://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=P1009S1K.PDF
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
EKBD  EPA-454/B-08-001 Research Triangle Park Library/RTP, NC 08/22/2008
NTIS  PB2008-111717 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 03/10/2010
Collation 1 v. (various paging) : ill., charts ; 28 cm.
Abstract
When applying the AERMET meteorological processor (EPA, 2004a) to process meteorological data for the AERMOD model (EPA, 2004b), the user must determine appropriate values for three surface characteristics: surface roughness length (zo), albedo (r), and Bowen ratio (Bo). The surface roughness length is related to the height of obstacles to the wind flow and is, in principle, the height at which the mean horizontal wind speed is zero based on a logarithmic profile. The surface roughness length influences the surface shear stress and is an important factor in determining the magnitude of mechanical turbulence and the stability of the boundary layer. The albedo is the fraction of total incident solar radiation reflected by the surface back to space without absorption. The daytime Bowen ratio, an indicator of surface moisture, is the ratio of sensible heat flux to latent heat flux and, together with albedo and other meteorological observations, is used for determining planetary boundary layer parameters for convective conditions driven by the surface sensible heat flux. Further details regarding the AERMOD model formulations and their dependence on surface characteristics are provided in Cimorelli, et al. (2004). The AERSURFACE tool has been developed to aid users in obtaining realistic and reproducible surface characteristic values, including albedo, Bowen ratio, and surface roughness length, for input to AERMET. The tool uses publicly available national land cover datasets and look-up tables of surface characteristics that vary by land cover type and season. This users guide provides a technical description of the AERSURFACE tool, including information on the data used by AERSURFACE to provide these surface characteristics for AERMET. Detailed user instructions for application of AERSURFACE are also provided.
Notes
EPA project officer: Roger W. Brode. "January 2008." "EPA-454/B-08-001." PB2008-111717.